​​​​RP EBW Detonator​. P/N ​. The RP explosive is contained in a ” thick stainless steel case which is crimped onto the plastic head. OPEN ACCESS. A view on the functioning mechanism of EBW detonators -part 1: electrical characterisation. To cite this article: E A Lee et al J. Phys.: Conf. Exploding Bridgewire (EBW) Detonators are in widespread use and have proven reliability and performance characteristics. Since their invention there have.

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When fired, it creates a strong electromagnetic pulsewhich is inductively coupled into one or more secondary coils connected to the bridge wires or slapper foils.

A view on the functioning mechanism of EBW detonators -part 1: electrical characterisation

Closeup with EBW highlighted. Modern exploding-bridgewire detonators arranged in a tray. The extremely short rise times are usually achieved by discharging a low- inductancehigh-capacitance, high-voltage capacitor e.

Content from this work may detonaor used under the terms of the Creative Commons Attribution 3. Low- impedance capacitors and low-impedance coaxial cables are required to achieve the necessary current rise rate. Views Read Edit View history.

This in turn has led to the calculation of bew energy efficiency of the fireset bridgewire system and an estimate of the energy delivered post bridgewire burst. Given a sufficiently high and well known amount of electric current and voltage, the timing of the bridgewire vaporization is both extremely short a few microseconds and extremely precise and predictable standard deviation of time to detonate as low as a few tens of nanoseconds. A very rough approximation for the capacitor is a rating of 5 kilovolts and 1 microfarad, and the peak current ranges between and amperes.


The exploding-bridgewire detonator EBWalso known as exploding wire detonator is a type of detonator used to initiate the detonation reaction in explosive materialssimilar to a blasting cap because it is fired using an electric current. This is sufficiently precise for very low tolerance applications such as nuclear weapon explosive lenses. During this phase detnoator electrical resistance of retonator bridgewire assembly rises.

To find out more, see our Privacy and Cookies policy. The measurement of current, time to bridgewire burst and the transient voltage across the bridgewire at burst have enabled the determination of the energy used in bursting the bridgewire. Any further distribution of this work must maintain attribution to the author s and the title of the work, egw citation and DOI.

Exploding-bridgewire detonator

Dtonator use is limited by the thermal stability range of PETN. The resulting shock and heat initiate the high explosive. The EBW is the Y-shaped device with two wires coming in at angles along the surface. During initiation, the wire heats with the passing current until melting point is reached. EBWs use a different physical mechanism than blasting caps, using more electricity delivered much more rapidly, and explode in a much more precise timing after the electric current is applied, by the process of exploding wire method.

By continuing to use this site you agree to our use of cookies. A low energy density capacitor equivalent to a compression generator would be roughly the size of a soda can. Retrieved July 14, This accounts for the heavy cables seen in photos of the Trinity ” Gadget “; high voltage cable requires good insulation and they had to deliver a large current with detontaor voltage drop, lest the Detonaator not achieve the phase transition quickly enough.


RP EBW Detonator

The Fat Man Model EBW detonators used an unusual, high reliability detonator eebw with two EBW “horns” attached to a single booster charge, which then fired each of the 32 explosive lens units. The slapper detonator is a more recent development along similar lines. The results of the experimental work will be presented, together with the implications for the initiation mechanism of PETN in an exploding bridgewire detonator.

Consequently, the detonators must have very precise timing. Buy this article in print.

Exploding-bridgewire detonator – Wikipedia

From the available explosives, only PETN at low densities can be initiated by sufficiently low shock to make its use practical in commercial systems as a part of the EBW initiator. EBWs were developed as a means of detonating multiple explosive charges simultaneously, mainly for use in plutonium-based nuclear weapons in which a dehonator core called a pit is compressed very rapidly.

Primary explosives such as lead azide are very sensitive to static electricity, radio frequency, shock, etc. An EBW has two main parts: Since explosives detonate at typically 7—8 kilometers per second, or 7—8 meters per millisecond, a 1 millisecond delay in detonation from one side of a nuclear weapon to the other would be longer than the time the detonation would take to cross the weapon.

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